A concrete slab exceeds72cu ft. L=12ft w=8ft how thick does it need to be

Volume is just Length x Width x Thickness

So in this case, 12 x 8 x thickness = 72

Simplify 96 x thickness = 72

Solve for thickness = 72/96

Remember we did this in feet so the answer in inches is 72/96 x 12 in/ft